Paper bags produced every year are ______ the world’s production of vehicles.

A. as three times heavy as B. three times weight of

C. three times the weight of D. three times as heavier as

 

C

【解析】

試題分析：考查倍數(shù)和比較等級。倍數(shù)必須放在比較等級的前面，常見的結(jié)構(gòu)有：倍數(shù)+比較級+than；倍數(shù)+as...as；倍數(shù)+the weight/size/length of...等。A項的倍數(shù)放在了as...as中間，排除A；D項中的as...as中間應(yīng)該用原級，排除D；B項結(jié)構(gòu)不正確，故選C。

考點：考查倍數(shù)和比較等級

 

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